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A platform for research: civil engineering, architecture and urbanism
BORON NITRIDE SINTERED BODY AND METHOD FOR PRODUCING BORON NITRIDE SINTERED BODY
PROBLEM TO BE SOLVED: To provide a boron nitride sintered body having little anisotropy of the thermal conductivity and the coefficient of thermal expansion.SOLUTION: A hexagonal boron nitride sintered body (2a, 2b) is produced by at least one pressing process and a subsequent sintering process from a powder (P) of a hexagonal boron nitride, and its density is deliberately adjusted to less than 1.6 g/cm. Studies have shown that, because of the selection of this low density, the boron nitride sintered body (2a, 2b) exhibits extremely high isotropy compared to conventional hexagonal boron nitride sintered bodies. This is in particular relevant to the thermal conductivity and the coefficient of thermal expansion, which are also hardly dependent on temperature.
【課題】熱伝導度及び熱膨張係数の異方性の小さい窒化ホウ素焼結体の提供。【解決手段】窒化ホウ素焼結体が少なくとも１つのプレス工程とそれに続く焼結工程によって六方晶系窒化ホウ素の粉末（Ｐ）から形成され、意図的に１．６ｇ／ｃｍ３より小さい密度に調節され、試験から、この低密度を選択することによって、従来の六方晶系窒化ホウ素焼結体に比較すると、窒化ホウ素焼結体（２ａ、２ｂ）は極めて高い等方性を有することが明らかにされ、このことは、特に熱伝導性並びに熱膨張係数に該当し、それらは温度にもほとんど依存しない六方晶系窒化ホウ素焼結体（２ａ、２ｂ）。【選択図】図１
BORON NITRIDE SINTERED BODY AND METHOD FOR PRODUCING BORON NITRIDE SINTERED BODY
PROBLEM TO BE SOLVED: To provide a boron nitride sintered body having little anisotropy of the thermal conductivity and the coefficient of thermal expansion.SOLUTION: A hexagonal boron nitride sintered body (2a, 2b) is produced by at least one pressing process and a subsequent sintering process from a powder (P) of a hexagonal boron nitride, and its density is deliberately adjusted to less than 1.6 g/cm. Studies have shown that, because of the selection of this low density, the boron nitride sintered body (2a, 2b) exhibits extremely high isotropy compared to conventional hexagonal boron nitride sintered bodies. This is in particular relevant to the thermal conductivity and the coefficient of thermal expansion, which are also hardly dependent on temperature.
【課題】熱伝導度及び熱膨張係数の異方性の小さい窒化ホウ素焼結体の提供。【解決手段】窒化ホウ素焼結体が少なくとも１つのプレス工程とそれに続く焼結工程によって六方晶系窒化ホウ素の粉末（Ｐ）から形成され、意図的に１．６ｇ／ｃｍ３より小さい密度に調節され、試験から、この低密度を選択することによって、従来の六方晶系窒化ホウ素焼結体に比較すると、窒化ホウ素焼結体（２ａ、２ｂ）は極めて高い等方性を有することが明らかにされ、このことは、特に熱伝導性並びに熱膨張係数に該当し、それらは温度にもほとんど依存しない六方晶系窒化ホウ素焼結体（２ａ、２ｂ）。【選択図】図１
BORON NITRIDE SINTERED BODY AND METHOD FOR PRODUCING BORON NITRIDE SINTERED BODY
窒化ホウ素焼結体および窒化ホウ素焼結体を形成する方法
RUDOLF KARL GRAU (author) / RODRIGUE NGOUMENI YAPPI (author) / HUBERT JOSEF SCHWEIGER (author)
2015-06-04
Patent
Electronic Resource
Japanese
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